scholarly journals Studi Perancangan Jaringan Worldwide Interoperability For Microwave Access (Wimax) Di Area Banyumas

2012 ◽  
Vol 4 (1) ◽  
pp. 1
Author(s):  
Alfin Hikmaturokhman ◽  
Anggun Fitrian Isnawati ◽  
Ike Lestari
Keyword(s):  
Correction Factor ◽  
Data Access ◽  
Base Station ◽  
Direct Path ◽  
Final Project ◽  
Customer Premise Equipment ◽  
Wireless Broadband ◽  
Frequency Correction ◽  
Total Data ◽  
Non Line Of Sight

At present the need for higher internet connection along with the age which is growing so fast. Then there is the latest breakthrough in telecomunications that is WiMAX technology is a wireless broadband technology reffered the IEEE 802.16 standard. WiMAX technology comes with a network of excellence in aspects of data access speed, wide area coverage and the presence of QoS is can allocate frequencies in accordance with user needs using OFDM technology. WiMAX technology can reach area far as 50 kilometers, also allows user equipment (customer premise equipment or CPE) to get a broadband connection without having a direct path (non line of sight, NLOS) to the base station (BS) and provides a total data rate of up to 75 Mbps. Results of this Final project assumed that the area where will be design is Banyumas district. Then final project results of the PRX -100.31 dB; the Total Margin of 23.56 dB; Path los of 134.5 dB; gamma (?) of 4.375; Frequency correction factor (?PLf) of 0,36; antenna correction factor (?PLh) is -3,25; Radius Cells (d) is approximately 1995 meters; area of cell is at 10,34010495 km2 and the number of cells 133

scholarly journals Probability Weighting Localization Algorithm Based on NLOS Identification in Wireless Network

2019 ◽  
Vol 2019 ◽  
pp. 1-8 ◽  
Author(s):  
Shixun Wu ◽  
Shengjun Zhang ◽  
Kai Xu ◽  
Darong Huang
Keyword(s):  
Base Station ◽  
Line Of Sight ◽  
Time Of Arrival ◽  
Probability Weighting ◽  
Localization Algorithm ◽  
Angle Of Arrival ◽  
Chi Square ◽  
Home Base ◽  
Angle Measurements ◽  
Non Line Of Sight

In this paper, a localization scenario that the home base station (BS) measures time of arrival (TOA) and angle of arrival (AOA) while the neighboring BSs only measure TOA is investigated. In order to reduce the effect of non-line of sight (NLOS) propagation, the probability weighting localization algorithm based on NLOS identification is proposed. The proposed algorithm divides these range and angle measurements into different combinations. For each combination, a statistic whose distribution is chi-square in LOS propagation is constructed, and the corresponding theoretic threshold is derived to identify each combination whether it is LOS or NLOS propagation. Further, if those combinations are decided as LOS propagation, the corresponding probabilities are derived to weigh the accepted combinations. Simulation results demonstrate that our proposed algorithm can provide better performance than conventional algorithms in different NLOS environments. In addition, computational complexity of our proposed algorithm is analyzed and compared.

Frequency Effects in the Elevated Temperature Crack Growth Behavior of Austenitic Stainless Steels—A Design Approach

1979 ◽  
Vol 101 (2) ◽  
pp. 171-176 ◽  
Author(s):  
L. A. James
Keyword(s):  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Correction Factor ◽  
Stainless Steels ◽  
Growth Behavior ◽  
Crack Growth Behavior ◽  
Fatigue Crack Growth Behavior ◽  
Standard Frequency ◽  
Frequency Correction

The fatigue-crack growth behavior of annealed types 304 and 316 stainless steels is determined over a range of cyclic frequencies in an air environment at temperatures of 800°F (427°C), 1000°F (538°C) and 1200°F (649°C). A good portion of the experimental data supports the observation that the fatigue crack growth rates at a given value of ΔK increases with decreasing frequencies. The behavior ot each temperature is normalized relative to the behavior at a “standard” frequency of 40 cpm, and a simple frequency correction factor is derived. This frequency correction factor, more applicable to type 304 than to 316 stainless steels, is further coupled with temperature effects data taken at the “standard” frequency and combined with a stress ratio correction to furnish estimates of the fatigue crack growth behavior of those two steels over a fairly wide range of parameters.

scholarly journals Efficient and secure attribute-based heterogeneous online/offline signcryption for body sensor networks based on blockchain

2019 ◽  
Vol 15 (9) ◽  
pp. 155014771987565 ◽  
Author(s):  
Jawaid Iqbal ◽  
Arif Iqbal Umar ◽  
Noorul Amin ◽  
Abdul Waheed
Keyword(s):  
Sensor Networks ◽  
Universal Access ◽  
Security Analysis ◽  
Data Access ◽  
Base Station ◽  
Wireless Channel ◽  
Patient Data ◽  
Body Sensor Networks ◽  
Health Record ◽  
Patient Health

In body sensor networks, both wearable and implantable biosensors are deployed in a patient body to monitor and collect patient health record information. The health record information is then transmitted toward the medical server via a base station for analysis, diagnosis, and treatment by medical experts. Advancement in wireless technology although improves the patient health–monitoring mechanism, but still there are some limitations regarding security, privacy, and efficiency due to open wireless channel and limited resources of body sensor networks. To overcome these limitations, we have proposed an efficient and secure heterogeneous scheme for body sensor networks, in which biosensor nodes use a certificate-less cryptography environment to resolve the key escrow and certificate-management problems, while MS uses a public key infrastructure environment to enhance the scalability of the networks. Furthermore, we design an online/offline signcryption method to overcome the burden on biosensor nodes. We split the signcryption process into two phases: offline phase and online phase. In the offline phase, the major operations are computed without prior knowledge of patient data. While in online phase, the minor operations are computed when patient data are known. Besides, we have used a new hybrid blockchain technology approach for the secure transmission of patient information along with attributes stored in the medical server toward the cloud that provides ease of patient data access remotely from anywhere by the authorized users and data backup in case of medical server failure. Moreover, hybrid blockchain provides advantages of interoperability, transparency traceability, and universal access. The formal security analysis of the proposed scheme is proved in the standard model, and informal security assures that our scheme provides resistance against possible attacks. As compared to other existing schemes, our proposed scheme consumes fewer resources and efficient in terms of processing cost, transmission overhead, and energy consumption.

scholarly journals ANALYSIS OF TRANSLATION TECHNIQUES IN LORE’S I AM NUMBER FOUR

LINGUISTICA ◽  
2019 ◽  
Vol 8 (3) ◽  
pp. 171
Author(s):  
Dede Syaifuddin Nasution ◽  
Lidiman SM Sinaga ◽  
Masitowarni Siregar
Keyword(s):  
Qualitative Approach ◽  
The Novel ◽  
Related Research ◽  
Final Project ◽  
Descriptive Research ◽  
Translation Technique ◽  
Translation Techniques ◽  
Total Data ◽  
Analyze Data ◽  
Descriptive Qualitative

This final project is a study which analyzes translation techniques used in the translation of novel I am Number Four by Pittacus Lore. The translation techniques introduced by Molina and Albir (2002) is the theory I use in this study. The object of the study is to explain the techniques used by the translator in translating I am Number Four. This research is classified into descriptive research. It is the study in which I need to collect and analyze data to get conclusion. However, I also find out that it is essential to combine the qualitative approach with the quantitative one. The data are gained by reading novel, comparing the novel, identifying, classifying, counting, and conclusion. The result of the study shows that there are 12 techniques found in the data. They are, namely, adaptation, amplification, borrowing, calque, discursive creation, established equivalent, generalization, linguistic compression, literal, particularization, reduction, and transposition. The total data are 671 direct speeches of I am Number Four. The total techniques of the data found are 671. The percentage of each techniques are as follows: (1) borrowing occurs 132 times and represents 19.7%, (2) literal occurs 119 times and represents 17.73%, (3) generalization occurs 97 times and represents 14.46%, (4) established equivalent occurs 94 times and represents 14.01%, (5) amplification occurs 76 times and represents 11.3%, (6) particularization occurs 52 times and represents 7.75%, (7) linguistic compression occurs 43 times and represents 6.41%, (8) reduction occurs 35 times and represents 5.22%, (9) transposition occurs 12 times and represents 1.79%, (10) adaptation occurs 5 times and represents 0.74%, (11) calque occurs 3 data and represents 0.45%, (12) discursive creation occurs 3 times and represents 0.45%. Finally, the conclusions above lead me to provide the following suggestions. First, for translator: it is important to explore different translation techniques to make the translated text clear and try to give an explanation such as footnote in the novel in order to make the reader understand the text. Second, for further researcher: A further research can give knowledge that can be beneficial for the readers and can be the next related research to be reviewed. A further study is also needed to follow the development of the translation study.Keywords: translation technique, novel, I am Number Four, descriptive qualitative

scholarly journals Implementation and evaluation of a 2.4 GHz multi-hop WSN: LoS, NLoS, different floors, and outdoor-to-indoor communications

2021 ◽  
Vol 11 (6) ◽  
pp. 5170
Author(s):  
Vasin Chaoboworn ◽  
Yoschanin Sasiwat ◽  
Dujdow Buranapanichkit ◽  
Hiroshi Saito ◽  
Apidet Booranawong
Keyword(s):  
Ieee 802.15.4 ◽  
Base Station ◽  
Sensor Nodes ◽  
Line Of Sight ◽  
Delivery Ratio ◽  
Packet Delivery ◽  
Communication Reliability ◽  
Ieee 802.15.4 Standard ◽  
Test Scenarios ◽  
Non Line Of Sight

In this paper, the communication reliability of a 2.4 GHz multi-hop wireless sensor network (WSN) in various test scenarios is evaluated through experiments. First, we implement an autonomous communication procedure for a multi-hop WSN on Tmote sky sensor nodes; 2.4 GHz, an IEEE 802.15.4 standard. Here, all nodes including a transmitter node (Tx), forwarder nodes (Fw), and a base station node (BS) can automatically work for transmitting and receiving data. The experiments have been tested in different scenarios including: i) in a room, ii) line-of-sight (LoS) communications on the 2nd floor of a building, iii) LoS and non-line-of-sight (NLoS) communications on the 1st floor to the 2nd floor, iv) LoS and NLoS communications from outdoor to the 1st and the 2nd floors of the building. The experimental results demonstrate that the communication reliability indicated by the packet delivery ratio (PDR) can vary from 99.89% in the case of i) to 14.40% in the case of iv), respectively. Here, the experiments reveal that multi-hop wireless commutations for outdoor to indoor with different floors and NLoS largely affect the PDR results, where the PDR more decreases from the best case (i.e., the case of a)) by 85.49%. Our research methodology and findings can be useful for users and researchers to carefully consider and deploy an efficient 2.4 GHz multi-hop WSN in their works, since different WSN applications require different communication reliability level.

scholarly journals Building an HMI and Demo Application of WSN-based Industrial Control Systems

2011 ◽  
Vol 7 (2) ◽  
pp. 107-111
Author(s):  
Ali Abed ◽  
AbdulAdhem Ali ◽  
Nauman Aslam
Keyword(s):  
Control Systems ◽  
Low Cost ◽  
Data Access ◽  
Industrial Applications ◽  
Base Station ◽  
Temperature Monitoring ◽  
Sensor Nodes ◽  
Wireless Sensor ◽  
Monitoring And Control ◽  
And Control

In this paper we present the details of methodology pursued in implementation of an HMI and Demo Temperature Monitoring application for wireless sensor-based distributed control systems. The application of WSN for a temperature monitoring and control is composed of a number of sensor nodes (motes) with a networking capability that can be deployed for monitoring and control purposes. The temperature is measured in the real time by the sensor boards that sample and send the data to the monitoring computer through a base station or gateway. This paper proposes how such monitoring system can be setup emphasizing on the aspects of low cost, energy-efficient, easy ad-hoc installation and easy handling and maintenance. This paper focuses on the overall potential of wireless sensor nodes and networking in industrial applications. A specific case study is given for the measurement of temperature (with thermistor or thermocouple), humidity, light and the health of the WSN. The focus was not on these four types of measurements and analysis but rather on the design of a communication protocol and building of an HMI software for monitoring. So, a set of system design requirements are developed that covered the use of the wireless platforms, the design of sensor network, the capabilities for remote data access and management, the connection between the WSN and an HMI software designed with MATLAB.

The Effect of Neighboring Cells on Handover Decision Making Based on Fuzzy in the WCDMA Network

2017 ◽  
Vol 5 (2) ◽  
pp. 52-58
Author(s):  
Akbar Nur
Keyword(s):  
Decision Making ◽  
Fuzzy Logic ◽  
Base Station ◽  
Test Method ◽  
User Mobility ◽  
Handover Decision ◽  
Final Project ◽  
Soft Handover ◽  
Hard Handover ◽  
The Impact

In channel transfer (handover) from one Base Station to another Base Station. The purpose of this final project is to analyze the effect of neighboring cells on handover decisions on WCDMA networks based on fuzzy, in this handover process, handover decisions use several parameters related to handovers and supported by fuzzy logic. Relatively high user mobility demands a guarantee until the use of the service ends, the impact of user mobility results in the output being analyzed for this handover decision to help give consideration to the optimal handover decision. The method used is Tsukamoto fuzzy logic, for decision making, while the measurement method In the field, the drive test method is carried out by measuring the signal level around the base station area, and comparing the results of the two methods. Comparison of handover decisions between the results of fuzzy logic and measurements, for example for the results of no proper in fuzzy logic, yields a rate value of 0% for soft handovers and 100% for hard handovers, and for proper results in fuzzy logic, yields a rate value for measurement. 95.22% for soft / soft handover and 4.72% for hard handover

scholarly journals A Performance Study of Wireless Broadband Access (WiMAX)

2011 ◽  
Vol 7 (2) ◽  
pp. 125-129
Author(s):  
Maan Al-Adwany
Keyword(s):  
Fading Channels ◽  
Multipath Fading ◽  
Base Station ◽  
Small City ◽  
Broadband Access ◽  
Performance Study ◽  
Coverage Area ◽  
Multipath Fading Channels ◽  
Wireless Broadband ◽  
Wimax System

WiMAX (worldwide interoperability for microwave access) is one of the wireless broadband access technologies which supplies broadband services to clients, but it surpasses other technologies by its coverage area, where one base station can cover a small city. In this paper, WiMAX technology is studied by exploring its basic concepts, applications, and advantages / disadvantages. Also a MATLAB simulator is used to verify the operation of the WiMAX system under various channel impairments and for variety of modulation schemes. From the simulation results, we found that WiMAX system works well in both AWGN and multipath fading channels, but under certain constraints that are addressed in this paper.

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